Defined In/Out on GPU blocks

In all manuals for GPU blocks it says: "The connector closest to the slot bracket has to be used as Intel". However I see on pictures of some builds that has been posted to the Facebook Group, that this is clearly not always the case. For example see attached photo that I took from the FB Group.

My question is how important and strict is this rule? What will happen if you don't obey it?

Hello Vitali,
thanks for bringing this to our attention. The english translation is a bit misleading here. It's not a "must", it's a "should". If connected the wrong way round, as in the picture you provided, the temps will be around 5°C worse, and the flow rate suffers by around 1%. So, to reach optimal temperatures and flowrate, we recommend connecting the block the other way round.

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